Cutting and grinding apparatus



' July 26, 1932. JHOLLAND-LETZ CUTTING AND GRINDING APPARATUS original Filed April 1, 1927 2 Sheets-Sheet l July 26, 1932- .1.i-loLLAMn-I ETZA 1,868,983

CUTTING AND GRNDNG APPARATUS OrignliledA April l, 1927 2 Sheets-Sheet 2 Y www ww l@ Nw ww WN QN %N RW www wh;

Patented July 26, 1932 UNITED STATES PATENT OFFICE JOHN IIOLLAND-YLETZ, 0F `GROVVN POINT, INDIANA, ASSIGNOR TO THE LE'JZ MAN'U- FACTURING- COMPANY, OF CROW' N POINT, INDIANA, A CORPORATION OF INDIANA CUTTINGIAND GRINDING APPARATUS Application led April 1, 1927, Serial No. 180,085. Renewed March 26, 1931.

The present invention relates vto a cutting and grinding apparatus or mill.

One of the obj ects of the present invention is to provide an improved combination of a suction mechanism in connection with my cutting and grinding mill whereby the pulver ized material is. prevented from passing through the grinding mill so that the etliciency and capacity of the machine is increased to a maximum.

A further object of thel invention is to provide a suction mechanism in combination with the cutting and grinding mechanism whereby the dust created in the operation of cutting the ensilage or other material, which is objectionable to the operator, is entirely eliminated.

A still further object of the invention is to provide an improved form of cutting and grinding machine in combination with a suction fan mechanism in which the fan is employed to Vremove the powdered material which requires no further reduction and to mix the materials cut by the knives with those materials ground by the grinding mill as well as the powdered material and to thus thoroughly mix all of the materials and elevate the same to a suitable receptacle.

A still further object of the invention iS to providean improved form of cutting and grinding machine in which the same may be quickly adjusted so that the roughage cut by the cutting mechanism may be further ground or may be mixed in its cut up form with other material fed through the grinding mechanism so as to produce different types of rations in accordance with the different requirements.

These and other objects are accomplished by providing a construction and an arrangement of the various parts in the manner hereinafter described and particularly pointed out in the appended claims.

Referring to the drawings:

Figure 1 is an end elevational view partly in cross-section, showing the construction of my improved cutting and grinding mechamsm;

Figure 2 is a side elevational view partly in cross-section, showing the construction of my improved cutting and grinding mechamsm; n

FigureB is an enlarged fragmentary view partly in cross-section showing the construction of the removable plate which opens or closes the communication between the conveyor and the conduit leading to the fan housing; and

Figure 4 is an enlarged fragmentary side elevational viewV of the plate construction shown in Figure 3.

For the purpose of illustration, I have shown my improved form of cutting and grinding machine as being supported on suitable frame supporting legs or members and 11. The supporting legs 10 and 11 are secured to the frame 12 of the machine, only part of which is shown. Mounted in suitable bearings 13 and 14 which are supported by the main frame is a shaft 15. Secured to the frame and embracing the shaft 15 are two oppositely disposed cutter head plates 16 and 17. Mounted between the plates 16 and 17 is a cutter head which includes two spider-like members 18 and 19 which in turn are secured to the shaft 15. These spider-like members 18 and 19 are in the form of L-shaped arms as shown in Figure 2, and adjustably supported thereon are knives 20. (lo-operating with the knives and secured to a transverse member 21 is a stationary cutter bar 22. Extending around substantially one-half the cutter head and secured to the side plates 16 and 17 isa perforated arcuate plate 23. Positioned forwardly of the stationary cutter bar 22 is a feed roller 24, and extending forwardly from the feed roller in substantially a continuous plane with the roller is an endless conveyor apron 25 of the well known construction, only a portion thereof being shown for the purpose of illustration. Positioned above the feed roller 24 and the endless apron 25 is a iioating endless feeding apron 26 which is trained about the roller 27 journalled in side frame members 28 and a vertically movable roller 29.

Enclosing the upper portion of the knife casing is a cover 30 which has an elbow as shown at 31 secured thereto or formed integrallytherewith. Mounted in the lower portion of the covering 30 is a perforated curved plate 32. The curved plate 32 extends across the top of the knife head and is secured to the plates 17 and 16 by means of bolts 33 which in turn secure the cover 30 to the knife head casing. Extending beneath the curved perforated plate 23 is a substantially U- shaped trough 34 whichis secured to the main frame member 12 in any well known manner. One end of the trough is provided with an end plate 35 for closing the end thereof and supporting centrally therein a shaft 36. The other end of the shaft 36 is supported in a bearing formed on a depending arm 37 formed integrally with the transverse frame member 38. Secured to the shaft 36 is a conveyor screw 39. The conveyor screw 39 is operatively driven by a gear 36 which in turn is geared to a pinion 37. The pinion 37 is driven by a gear 38 secured to the shaft 15.

Mounted on the shaft 15 adjacent and to one side of the cutter head is a lifting screw 40. Secured to the shaft 15 adjacent the screw 40 is a crushing and conveying member 41 which in turn is provided with crushing and conveying lugs 42. Secured to the frame in any well known manner above the crushing and conveying member 41 is a hopper 43. Mounted adjacent the hopper and crushing member 41 is a grinding mechanism which includes aburr casing 44, a rotary burr 45 mounted in a burr holder 46, and a stationary burr 47 mounted in the customary trammels. y

The mechanism per se thus far described does not constitute any part of the present invention except in combination with my pneumatic or suction mechanism to be hereinafter described, and for that reason it is believed that a more detailed description of the same is unnecessary. For a more detailed description of this mechanism, see my Patent No. 1,558,613, dated october 27, 1925.

One of the essential features of my present invention consists in providing a suction or fan mechanism in which; the fan performs the triple function of increasing the capacity of the above described machine by removing the pulverized material which requires no further reduction from adjacent the cutter head so that the same will be prevented from passing through the grinding mechanism, thereby removing this unnecessary work from the grinding mechanism. The second function performed by my improved pneumatic or fan mechanism is to remove the presence of dust during the operation of the machine which has been found to be very objectionable to the operator of the same. The third function performed by my improved suction and fan mechanism is to produce a completely mixed forage and to elevate the same into a suitable receptacle.

This improved suction and fan mechanism comprises a fan casing or housing 48 in which is mounted a rotary fan 49 secured to one end of the shaft 50. The fan 49 is provided with six arms on which fan blades 49 are mounted. Connected with the periphery of the fan housing 48 is a delivery or elevating conduit 48 which leads to a suitable elevated receptacle for receiving the reduced material. The shaft 50 is mounted in suitable bearings 51 and 52 secured to the fan casing 48 and one of t-he frame supporting members 10 respectively. Connected with one side of the fan housing 48 is an elbow 53 which has a. connection 54 connected by means of a conduit 55 to the elbow 31 secured to the cover plate of the cutter head casing. The other branch of the elbow 53, as shown at 55, is connected by a conduit 56 to an extension 57 of the conveyor trough 34. Removably mounted between the conveyor trough 34 and the extension 57 is a plate 58 by means of which the communication between the fan and the conveyor trough may be opened or closed. The plate 58 may be secured in a position to close the communication between the conveyor trough and the fan casing by means of a bolt 59 which may extend through aligned apertures 60 and 61 formed in the plate58 and in bracket 62 respectively. The bracket 62 is secured to the lower side of the trough 34. The plate 58 is provided with a slo-t 63 which embraces the depending bearing 37 and also forms a guide for securing the plate in position when the communication is closed between the trough 34 and the fan. Removably mounted in the transverse frame members 38 and 64 and preferably in suitable grooves formed therein is a horizontal plate 65 which opens and closes the communication between the trough 34 and the passage in which the lifting screw 40 is mounted. This plate 65 is horizontally movable in the guides or transverse frame members 38 and 64 for opening or closing the communication between the trough and the lifting screw. The other side of the fan casing 48 is connected adjacent the center thereof by means of a conduit 66 with the lower side of the grinding mechanism. The upper end of the conduit 66 is connected by means of a connection 67 to the burr cover 68 and burr casing 44.v The outer end of the shaft 50 is provided with a pulley 69 over which may be trained a belt for operatively driving the same from the pulley mounted on the shaft 15. Mounted adjacent the pulley 70 is a drive pulley 71 to which the power is applied for driving the entire mechanism.

In the operation of the above described device, let Vus assume that the plate, 58 is removed so that the trough 34 communicates with the fan casing 48 through the conduit 56. Let us also assume that the plate 65 is positioned in the position shown in Figure l, closing communication between the trough 34 and the passage'V leading to the lifting screwV 40. When the machine is `adjusted in this position the material may be fed on the endless conveyor 25 into the cutter head Where the knives of the cutter head will cut the materialin short lengths and at the same time by reason of the suction fan 49 and conduit 50 connected therewith to the cutter head housing the pulverized material will be drawn through the perforated plate or screen 32, eliminating the pulverized material and dust fromthe surrounding machine which has been found to be objectionable to the operator. At the same time, whatever grain is desired to be mixed with the roughage, the same may be put into the hopper 43 and ground by the grinding mechanism7 from which it will pass through the conduit 66 and be mixed by the operating fan together with the roughage and pulverized material delivered through the conduits 56 and 55 respectively. At the same time the fan will elevate this mixed material into a suitable receptacle.

Should the operator desire to reduce the roughage to a finer forage,the plate 58 may be inserted to close the communication between the trough 34 and the conduit 56 leading to the fan housing and at the same time remove the plate 65, thereby forming a communication between-the trough 34 and the passage leading to the elevating screw 40. Vhen this is done the material cut by the cutter head is passed throughthe perforated plate 23 where the same is conveyed to one end of the trough 34 by the conveyor screw 39 and elevated through the opening formerly occupied by the plate 65 b y the elevating screw 40, where the cut material is then crushed and conveyed forward by the crushing and conveying screw 41 to the grinding burrs 45 and 47. The operato-r may add whatever grain is desired to be mixed with the cut material by placing the same in the hopper 43. It will be noted that when the machine is operated in this manner the fan continues to function by reason of the conduits leading therefrom to remove the pulverized material as well as the dust from the casing of the cutter head, thereby increasing the capacity of the machine because this powdered material if permitted to pass through the grinding mechanism obviously reduces theV capacity of the machine because a greater amount is required to pass through the grinding mechanism. This fan mechanism, in addition to removing the powdered material from the grinding mechanism, thoroughly mixes this powdered material with the material discharged from the grinding mechanism and elevates the same through the conduit 48 leading to a suitable receptacle.

While in the above specification I have described one embodiment which my invention may assume in practice, it will of course be understood that the same is capable of modification and that modification may be employed without departing from the spirit and scope of the invention as expressed in the following claims.

What I claim as my invention and desire to secure by Letters Patent is l. A device of the class described, the combination with a cutter head, of a crushing and conveying mechanism positioned adjacent said cutter head for receiving the material cut by said cutter head, a grinding mechanism positioned adjacent said crushing andiconveying mechanism for grinding the material fed thereto, and a suction mechanism having a conduit connected adjacent said cutter head and adjacent said grinding mechanism for withdrawing the pulvcrized material from said cutter head and simultaneously withdrawing the ground material from said grinding mechanism and mixing the same with said pulverized material.

2. A device of the class described the combination with a cutter head of a conveying mechanism positioned below said cutter head, of a lifting mechanism positioned adjacent said conveying mechanism, of a grinding mechanism positioned adjacent said lifting mechanism, and suction operated means connected adjacent said cutter head and adjacent said grinding mechanism for simultaneously removing the pulverized material from adj acent said cutter head and conveying the ground material from said grinding mechanism.

3. A device of the class described the combination with a cutter head, of a casing for said cutter head, a grinding mechanism, means for conveying the material cut by said cutting mechanism to said grinding mechanism, means for removing certain of the material passing through said cutting mechanism for preventing the same from passing through said grinding mechanism and means for preventing the material from passing from said cutting mechanism to said grinding mechanism.

4. In a machine of the class described comprising a frame, a cutter head mounted on rial cut by said cutting mechanism to said grinding mechanism, and pneumatic means for withdrawing certain of the material from said cutting mechanism as Vsaid material is passing through said cutting mechanism.

5. In a machine of the class described comprising a frame, a cutter head mounted on said frame, a casing orsaid cutter head, a grinding mechanism mounted on said frame, means for conveying the material cut by said cutting mechanism to said grinding mechanism, and means for withdrawing certain of the material passing through said cutting mechanism, and for combining and mixing the materials ground by said grinding mechanism with the material withdrawn from said cutter head.

G. In a machine of the class described comprising a trame, a rotary cutter head mounted on said frame, a substantially enclosed casing for said cutter head, a grinding mechanism mounted on said trame, a conveying and elevating mechanism mounted on said 'frame for conveying the material 'from said cutter head to said `grinding mechanism, a rotary fan mounted in said casing whereby certain of the materials are withdrawn from sail casing, and a second conduit leading from said grinding mechanism to tan whereby the materials collected by said fan are thoroughly mixed and elevated.

7. In machine of the class described ccmprising a frame, a shaft journalled on said frame, a rotary cutter head mounted on said shaft, a casing substantially enclosing said cutter head, a grinding mechanism mounted on said shaft, a conveying and elevating mechanism for conveying the material cut by said cutter head to said grinding mechanism, a fan casing having a tan mounted on said frame, a conduit leading from said fan casing to said cutter head casing for withdrawing the pulv'erized material. from said lastnamcd casing, and a second conduit leading from said fan casing to said grinding mechanism whereby the material withdrawn from said cutter head casing is thoroughly mixed with the material from said grinding mechanism and elevated by said fan.

8. In a machine of the class described comprising a frame, a rotary cutter head mounted on said frame, a casing substantially enclosing said cutter head, a grinding mechanism mounted on said trame, conveying and elevating screws mounted on said frame for conveying and elevating the material cut by said cutter mechanism to sain grinding mechanism, a hopper mounted on said trame through which materials may be ted to said grinding mechanism.I and suction operated means connecting said cutter head casing with said grinding mechanism whereby the pulverized material passing through said cutter head is prevented from passing through said grinding mechanism.

9. A device of the class described, the combination with'a cutter head, of a casing for said cutter head, a grinding mechanism, means for conveying Vmaterial cut by said cutter head to said grinding mechanism and means for removing certain of the material from said casing previous to being cut by said cutting mechanism for reducing the amount of material vpassing through said grinding mechanism.

10. In a device of the class described comprising a frame, a cutter head mounted on said trame, a casing for said cutter head. a grinding mechanism mounted on said frame, a conveying mechanism for conveying the material from said cutter head to said grinding mechanism, and means for increasing the capacity of said machine by withdrawing certain of the materials from said cutter head casing.

l1. In a device of the class described comprising a frame,-a cutter head mounted on said frame, a casing for said cutter head, a grinding mechanism mounted on said frame, a conveying mechanism for conveying the material from said cutter head t-o said grinding mechanism, and suction operated means connected with said cutter head casing for withdrawing certain of the materials passing therethrough for increasing the capacity of said machine.

l2. In a device of the class described comprising a frame, a cutter head mounted on said frame, a casing for said cutter head, a grinding mechanism mounted on said frame, a conveying mechanism for conveying the material from said cutter head to said grinding mechanism, and suction operated means connected with said cutter head casing and connected With said grinding mechanism for withdrawing certain materials passing through said cutter head casing and mixing the same with the materials after passing through said grinding mechanism whereby the capacity of the machine is increased.

13. In a device of the class described comprising a frame, a cutter head mounted on said frame, a casing for said cutter head, a grinding mechanism mounted on said frame, a conveying mechanism for conveying the material from said cutter head to said grindinfr mechanism, a fan and fan casing mounted on said frame, a conduit connecting said fan casing with said grinding mechanism, and a second conduit connecting said fan casing with said cut-ter head casing whereby certain of the materials passing through said cutter head casing are prevented from passing through said grinding mechanism and subsequently mixed with the material ground by said grinding mechanism.

14. A cutting and grinding apparatus comprising a frame, a cutter head mounted on said frame, a cutter head casing substantially enclosing said cutter head, a conveyor screw positioned below said cutter head for conveying the material cut by said cutter head, an elevating screw mounted on said frame co-operating with said conveyor screw, a grinding mechanism mounted on said frame, a crushing and conveying screw mounted on said frame for conveying material from said elevating screw to said grinding mechanism, and a suction operated fan mechanism connected With said cutter head casing for withdrawing the pulverized material from said cutter fhead casing, said suction Vfan mechanism being connected with said grinding mechanism whereby the pulverized material Withdrawn from said cutter head casing is mixed with the ground material from said grinding. mechanism.

1'5. A cutting and grinding apparatus comprising a frame, a cutter head mounted on said frame, a cutter head casing substantially enclosing said cutter head, a conveyor screw positioned below said cutter head for conveying the material cut by said cutter head, anelevating screw mounted on said frame co-operating with said conveyor screw, a grinding mechanism mounted on said frame, a crushing and conveying screw mounted on said frame for conveying material from said elevating screw to said grinding mechanism, a suction operated fan mechanism connected with said cutter head casing for withdrawing the pulverized material from said cutter head casing, said suction fan mechanism being connected with said grinding mechanism whereby the pulverized material withdrawn from said cutter head casing is mixed With the ground material from said grinding mechanism, and a hopper positioned over said crushing and conveying screw whereby additional material may be ground with other material passing therethrough.

16. A device of the class described, the combination with a cutter head, of a conveying mechanism for said cutter head, a lifting mechanism positioned adjacent to said conveying mechanismfor elevating the material conveyed thereby, a grinding mechanism associated therewith, means for controlling the communication between said conveyingl mechanism and said lifting mechanism and means for collecting together the materials passing through said grinding mechanism and said cutter head.

17. AV device of the class described, the combination with a cutter head, of a conveying mechanism located below said cut-ter head, a lifting mechanism positioned adjacent to said conveying mechanism for elevating the material conveyed thereby, a grinding mechanismv associated therewith, means for controlling the communication between said conveying mechanism and said lifting mechanism and means for collecting together` the materials passing through 'said grinding mechanism and said cutter head.

18. A device of the class described, Ythe combination with a cutter hcad,'of a conveying mechanism for said cutter head, a lifting mechanism positioned adjacent to ,said conveying mechanism for elevating the material conveyed thereby, a grinding mechanism associated therewith, a removable plate for controlling the communication between said conveying mechanism and said lifting mechanism and means for collecting together the materials after passing through said grinding mechanism and said cutter head.

19. A device of the class described, the combination with a cutter head, Vof a conveying mechanism for said cutter head, a lifting mechanism positionedadjacent to said conveying mechanism for elevating the material conveyed thereby, a grinding mechanism associated therewith, a slidable plate for opening or closing communication between said conveying mechanism and said lifting mechanism and meansfor collecting together the materials after passing through said grind-A ing mechanism and said cutter head.

20. In a Vmachine Aof the class described comprising a frame, a cutter head mounted on said frame, a casing for said cutter head, a grinding mechanism mounted on said frame, means for conveying the material cut by said cutting mechanism to said grinding mechanism, and pneumatic means for withdrawing certain of the material passing through said cutting mechanism, and for combining and mixing the materials ground by said grinding mechanism with the material withdrawn from said cutter head.

21. In a machine .of the class described comprising a frame, a cutter head mounted on said frame,.a casing for said cutter head, a grinding mechanism mounted on said frame, means for conveying the material cut by said cutting mechanismto said grindin mechanism, and means for adjusting sai machine whereby the material cut by said cutting mechanism is conveyed from said cutting mechanismto a common receptacle with the material fromsaid grinding mechanism.

22.4 In a machine of the class described comprising a frame, a cutter head mounted on said frame, a casing for said cutter head, a grinding mechanism mounted on said frame, means for conveying the material cut by said cutting mechanism to said grinding mechanism, and means for controlling the communication between said cutting mechanism and said grinding mechanism, a receptacle for said materials, separate conduits communicating each of said cutting and grinding m-echanisms with said receptacle and means for controlling the communication between said cutting mechanism and said receptacle, whereby the material passing through said cutting mechanism may be prevented from passing through said grinding mechanism.

A the material cut by said cutting mechanism to said grinding mechanism, a mixing mechanism having separate communications with said cutting mechanism and `said grinding mechanism, means whereby the cut material ici l el

from said cutting mechanism may be mixed with the ground material from said grinding mechanism, and means whereby the cut inaterial may be further reduced with other material by said grinding mechanism.

24. A machine of the class described comprising a frame, a cutting mechanism mounted` on said frame, a grinding mechanism mounted on said frame, means fbr conveying the material cut by said cutting mechanism to said grinding mechanism, a mixing mechanism, a conduit connecting said cutting mechanism with said mixing mechanism, a second conduit connecting said grinding mechanism with said mixing mechanism, a sliding pla-te mounted between said cutting mechanism and said grinding mechanism for controlling the passage of material therebetween, and a second sliding plate between said cutting mechanism and said mixing mechanism for controlling the passage of material therebetween. y

25. A machine of the class described comprising a frame, a cutting mechanism mountedk on'` said frame, a 'grinding mechanism mounted on said frame, means for conveying the material cut by said cutting mechanism to said grinding mechanism, a mixing mec-hanism, a conduit connecting said cutting mechanism with said mixing mechanism, a second conduit connecting said grinding mechanism with said mixing mechanism, a sliding plate mounted between said cutting mechanism and said grinding mechanism for controlling the passage of material therebetween, and a third conduit connecting said cutting mechanism with said mixing mechanism for withdrawing certain of the material and prevent the same from passing through said cutting mechanism.

A26. In a machine of the class described, comprising a frame, a cutter head mounted on said frame, a grinding mechanism mounted on said frame, a shaft mounted on said frame forming a common support for said cutter head'and said grinding mechanism, means for conveying material cut from said cutter mechanism to said grinding mechanism, said conveying means located below said cutter mechanism for conveying the material to one side thereof in the direction of said grinding mechanism, and means Yfor adjusting said machine whereby the material cut by said cutting mechanism may be, conveyed from said cutting mechanism to a common receptacle Leccese with the material from said grinding mechanism.

27. In a machine of the class described comprising a frame, a shaft journaled on said frame, a cutter head mounted on and adjacent one end of said shaft, a grinding mechanism mounted on and adjacent the other end of said shaft, a mixing mechanism mounted between said grinding mechanism and said cutter head, means for conveying the material from said grinding mechanism to said mixing mechanism, means for conveying the material from said cutter head to said mixing mechanism, and means for forcing the material passing through said cutting'mechanism into said grinding mechanism prior to passing into said mixing mechanism.

28. In a machine of the class described comprising a frame, a shaft journaled on said frame, a cutter head mounted on and adjacent one end of said shaft, a grinding mechanism mounted on and adjacent the other end of said shaft, a mixing mechanism mounted between said grinding mechanism and said cutter head, means for conveying the material from said grinding mechanism to saidL mixing mechanism, means for conveying the material from saidcutter head to said mixing mechanism, means for withdrawing certain of the material from adjacent said cutter head to said mixing-mechanism, and means for forcing the material cut by said cutter head into said grinding mechanism.

29. In a machine of the class described comprising a frame, a shaft journaled on said frame, a cutter head mounted on said shaft and driven thereby, a grinding mechanism mounted on said shaft and driven thereby, a mixing mechanism mounted between said cutter head and said grinding mechanism, said mixing mechanism comprising a rotary fan and fan casing, a conduit connecting said grinding mechanism with the axial center of Lone side of said fan casing, a conduit connecting said cutter head with the other side of the axial center of said fan casing, and means for forcing the material cut by said cutter head into said grinding mechanism prior to passing into said mixing mechanism. 30. In a machine of the class described, comprising a frame, a cutter head mounted on said frame, a grinding mechanism mounted on said frame, a shaft common to said cutter head and said grinding mechanism for supporting the same, a mixing mechanism located below said cutter head and grinding mechanism, .communication vbetween said grinding mechanism and said mixing mechanism, communication between said cutter head and said mixing mechanism, means for feeding material from said cutter head to said grinding mechanism, and means' including a partof said first named means wherebv the material may be conveyed from said cutteni` head directly to said mixing mechanism.

3l. In a machine of the class described, comprising a frame, a cutter head mounted `on said frame, a grinding mechanism mounted on said frame, means mounted on said frame for mixing the materialsV from said cutter head and said grinding mechanism and means for diverting the material from said critter head through said grinding mechanism.

32. Ina machine of the class described comprising a frame, a cutter head mounted on said frame, a grinding mechanism mounted on said frame, a mixing mechanism mounted on said frame for mixing the material cut by said critter head with the material ground by said grinding mechanism, and valve mechanism for changing the direction of travel of the material cut by said cutter head from said mixing mechanism to said grinding mechanism.- Y h 33. In a machine of the class described comprising a frame, a cutter head mounted on said frame, a grinding mechanism mounted on said frame, a fan mounted on said frame, a fan casing for said fan, and means for directing the material cut bysaid cutter head mechanism to said grinding mechanism or to said fan casing whereby different materials may be comminuted together or separately and subsequently thoroughly mixed and delivered by said fan.

34. In a machine Vof the class described comprising a frame, a cutter head mounted on said frame, a grinding mill mounted on said frame, a fan casing mounted on said frame, a fan mounted in said casing, means for conveying the material from said cutter head and said grinding mechanism to said fan casing whereby the different materials are comminuted and thoroughly mixed and delivered by said fan, and means for directing the material cut by said cutter head to said grinding mechanism.

35. In a machine of the class described, comprising a trame, a cutting mechanism mounted on said frame, a grinding mechanism mounted on said frame, a mixing mechanism mounted on said frame Jfor receiving the material from said grinding mechanism and said cutting mechanism for thoroughly mixing the material conveyed thereto, and manually controlled valve mechanism between said cutting mechanism and said grinding and mixing mechanism for controlling the direction of travel of the material cut by said cutting mechanism.

36. A device of the class described comprising a frame, a. cutter head mounted on said frame, a grinding mechanism mounted on said frame, means for conveying the material Jfrom said cutter head to said grinding mechanism, a mixing fan mounted on said frame, means for conveying the material from said grinding mechanism to said mixing fan, and means for diverting the material from said cutter head to said mixing fan.

37. A device of the class described comprising a frame, a cutter head mounted on said frame, a grinding mechanism mounted on said frame, means for conveying the material from said cutter head to said grinding mechanism, a fan and fan casing mounted on said frame, a conduit connected to said fan casing through which the material from said cutter head is conveyed to said fan casing, a second conduit connected to said fan casing for conveying the material from said grinding mechanism to said fan casing, and means whereby the material passing through said cutter head may be prevented from passing through said grinding mechanism and subsequently mixed with the material ground by said grinding mechanism.

38. In a machine of the class described,

comprising a frame, a cutter mechanism mounted on said frame, a grinding mechanism mounted on said frame, means for conveying the cut material from said cutter head to said grinding mechanism, said conveying means located below said cutting mechanism for conveying the material to one side thereof in the direction of said grinding mechanism, and means for adjusting said machine whereby the material cut by said cutting mechanism may be conveyed from said cutting mechanism to a common receptacle with the material from said grinding mechanism.

39. A machine of the class described comprising a frame, a cutting mechanism mounted on said frame, a grinding mechanism mounted on said frame, means for conveying the material cut by said cutting mechanism to said grinding mechanism, a mixing mechanism, a conduit connecting said cutting mechanism with said mixing mechanism, a second conduit connecting said grinding mechanism with said mixing mechanism, a valve mounted between said cutting mechanism and said grinding mechanism for controlling the passage of material therebetween, and a second valve between said cutting mechanism and said mixing mechanism for leo controlling the passagel of material there- Y between.

A machine of the class described comprismg a frame, cutting mechanism mounted on said frame, a grinding mechanism mount-` ed on said frame, means for conveying the cut material from said cutting mechanism to said grinding mechanism, a mixing mechanism, a conduit connecting said cutting mechanism with said mixing mechanism, a second conduit connecting said grinding mechanism with said mixing mechanism, and a valve mechanism for controlling the communication between said cutting mechanism and said grinding mechanism whereby the material may be diverted directly to said mixing mechanism.

41. A machine of the class described comprising a frame, a cutter head mounted on said frame, a casing for said cutter head. a grinding mechanism mounted on said frame, means for conveying the material Cut by said cutting mechanism to said grinding mechanism, and means for diverting the material cut by said cutter head to a common receptacle to be mixed with the material ground by said grinding mechanism.

In testimony whereof I have signed my name to this specication on this 26th day of March, A. D. 1927. Y.

JOHN HOLLAND-LETZ. 

